Among the following oxides, how many of them are amphoteric oxides ?
(a) `B_(2)O_(3)` , (b) `Al_(2)O_(3)` , (c ) `CaO` , (d) `ZnO`
(e) `Ga_(2)O_(3)` , (f) `SnO_(2)` , (g) `PbO_(2)` , (h) `BeO`
(i) `CuO` , (j) `Fe_(2)O_(3)`

Explanation

To determine how many of the given oxides are amphoteric, we need to analyze each oxide based on its chemical properties. Amphoteric oxides are those that can react with both acids and bases.

Let's go through the oxides one by one:

1. **B₂O₃ (Boron Trioxide)**:
- Boron oxide is primarily acidic in nature. It does not react with bases.
- **Conclusion**: Not amphoteric.

2. **Al₂O₃ (Aluminum Oxide)**:
- Aluminum oxide can react with both acids (forming aluminum salts) and bases (forming aluminate ions).
- **Conclusion**: Amphoteric.

3. **CaO (Calcium Oxide)**:
- Calcium oxide is a basic oxide and reacts with acids to form salts but does not react with bases.
- **Conclusion**: Not amphoteric.

4. **ZnO (Zinc Oxide)**:
- Zinc oxide reacts with both acids (forming zinc salts) and bases (forming zincates).
- **Conclusion**: Amphoteric.

5. **Ga₂O₃ (Gallium Oxide)**:
- Gallium oxide also exhibits amphoteric behavior, reacting with both acids and bases.
- **Conclusion**: Amphoteric.

6. **SnO₂ (Tin(IV) Oxide)**:
- Tin(IV) oxide can react with both acids and bases.
- **Conclusion**: Amphoteric.

7. **PbO₂ (Lead(IV) Oxide)**:
- Lead(IV) oxide is also amphoteric, reacting with both acids and bases.
- **Conclusion**: Amphoteric.

8. **BeO (Beryllium Oxide)**:
- Beryllium oxide is amphoteric as it reacts with both acids and bases.
- **Conclusion**: Amphoteric.

9. **CuO (Copper(II) Oxide)**:
- Copper(II) oxide is basic and reacts with acids but not with bases.
- **Conclusion**: Not amphoteric.

10. **Fe₂O₃ (Iron(III) Oxide)**:
- Iron(III) oxide is primarily basic and reacts with acids but not with bases.
- **Conclusion**: Not amphoteric.

Now, let's summarize the amphoteric oxides identified:

- Al₂O₃
- ZnO
- Ga₂O₃
- SnO₂
- PbO₂
- BeO

**Total Amphoteric Oxides = 6**

### Final Answer:
There are **6 amphoteric oxides** among the given options.